/* ===================================
   PLUMIA - Styles CSS
   Design moderne et élégant
   =================================== */

/* Variables CSS */
:root {
    /* Couleurs principales */
    --primary: #8B5CF6;
    --primary-dark: #7C3AED;
    --primary-light: #A78BFA;
    --secondary: #EC4899;
    --accent: #F59E0B;

    /* Couleurs neutres */
    --dark: #0F172A;
    --dark-light: #1E293B;
    --gray: #64748B;
    --gray-light: #94A3B8;
    --white: #FFFFFF;
    --off-white: #F8FAFC;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --gradient-dark: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);

    /* Typographie */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;

    /* Espacements */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 3rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Animations */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--dark);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Logo Header en haut de la page */
.logo-header {
    position: absolute;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

/* Boutons CTA */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

.cta-button.primary {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.cta-arrow {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.cta-button:hover .cta-arrow {
    transform: translateX(5px);
}

.nav-cta {
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-2xl) 0;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.floating-words {
    position: absolute;
    width: 100%;
    height: 100%;
}

.floating-word {
    position: absolute;
    font-family: var(--font-serif);
    font-size: 2rem;
    color: rgba(139, 92, 246, 0.08);
    animation: float 20s ease-in-out infinite;
    animation-delay: calc(var(--index) * 2s);
}

.floating-word:nth-child(1) { top: 10%; left: 10%; }
.floating-word:nth-child(2) { top: 20%; right: 15%; }
.floating-word:nth-child(3) { bottom: 30%; left: 20%; }
.floating-word:nth-child(4) { top: 40%; right: 25%; }
.floating-word:nth-child(5) { bottom: 20%; right: 10%; }
.floating-word:nth-child(6) { top: 60%; left: 5%; }

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    margin-bottom: var(--space-md);
}

.hero-small {
    display: block;
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--gray);
    margin-bottom: 0.5rem;
}

.hero-big {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    line-height: 1;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--dark);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--gray);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.hero-stats {
    display: flex;
    gap: var(--space-md);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-serif);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.book-preview {
    position: relative;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.book-cover {
    width: 250px;
    height: 350px;
    margin: 0 auto;
    position: relative;
    transform-style: preserve-3d;
    transform: perspective(1000px) rotateY(-15deg);
    transition: var(--transition-slow);
    animation: bookFloat 6s ease-in-out infinite;
}

.book-cover:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.book-spine {
    position: absolute;
    left: 0;
    top: 0;
    width: 40px;
    height: 100%;
    background: linear-gradient(90deg, #6B46C1 0%, #8B5CF6 100%);
    transform: rotateY(-90deg) translateZ(20px);
}

.book-front {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 0 10px 10px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--white);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.book-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.book-author {
    font-size: 0.875rem;
    opacity: 0.9;
}

.ai-assistant {
    position: absolute;
    bottom: -30px;
    right: -50px;
    animation: fadeIn 1s ease-out 1s both;
}

.ai-bubble {
    background: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    position: relative;
    max-width: 200px;
}

.ai-bubble::before {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 30px;
    width: 20px;
    height: 20px;
    background: var(--white);
    transform: rotate(45deg);
    box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.05);
}

.ai-text {
    font-size: 0.875rem;
    color: var(--gray);
    position: relative;
    z-index: 1;
}

/* Problem Section - Machine à écrire améliorée */
.problem {
    padding: var(--space-2xl) 0;
    background: var(--off-white);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: var(--space-xl);
    line-height: 1.3;
}

.typing-container {
    position: relative;
    display: inline-block;
}

.typing-word {
    color: var(--accent);
    font-weight: 600;
    display: inline-block;
    min-width: 80px;
    text-align: left;
}

.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 1.2em;
    background: var(--accent);
    margin-left: 2px;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
    position: relative;
    top: -0.1em;
}

/* Style spécifique pour le curseur visible */
.typing-cursor.active {
    opacity: 1 !important;
    animation: blink 1s step-end infinite !important;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

.problem-card {
    background: var(--white);
    padding: var(--space-lg);
    border-radius: 20px;
    text-align: center;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
    animation-delay: calc(var(--delay) * 0.2s);
}

.problem-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Icônes SVG élégantes */
.problem-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-sm);
    color: var(--primary);
    animation: float 3s ease-in-out infinite;
    animation-delay: calc(var(--delay) * 0.3s);
}

.problem-icon svg {
    width: 100%;
    height: 100%;
    stroke-width: 1.5;
}

.feature-icon {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-md);
    width: 60px;
    height: 60px;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 2;
    color: var(--primary);
    stroke-width: 1.5;
}

.note-icon {
    width: 20px;
    height: 20px;
    color: var(--gray-light);
}

/* Machine à écrire améliorée */
.typing-container {
    position: relative;
    display: inline-block;
}

.typing-word {
    color: var(--accent);
    font-weight: 600;
    display: inline-block;
    min-width: 80px; /* Empêche le reflow */
}

.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 1.2em;
    background: var(--accent);
    margin-left: 2px;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
    position: relative;
    top: -0.1em;
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--dark);
}

.problem-card p {
    color: var(--gray);
    line-height: 1.6;
}

/* Solution Section */
.solution {
    padding: var(--space-2xl) 0;
}

.solution-intro {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--gray);
    margin-top: var(--space-sm);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.feature {
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
    animation-delay: calc(var(--delay) * 0.2s);
}

.feature-icon {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-md);
}

.feature-icon span {
    font-size: 3rem;
    position: relative;
    z-index: 2;
}

.icon-glow {
    position: absolute;
    inset: -20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.2;
    filter: blur(20px);
    animation: pulse 3s ease-in-out infinite;
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    color: var(--dark);
}

.feature p {
    color: var(--gray);
    line-height: 1.6;
}

/* How it works */
.how-it-works {
    padding: var(--space-2xl) 0;
    background: var(--off-white);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 800px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    opacity: 0;
    transform: scale(0.8);
    animation: scaleIn 0.8s ease-out forwards;
    animation-delay: calc(var(--step) * 0.3s);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--space-sm);
}

.step-connector {
    flex: 0 0 100px;
    height: 2px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    position: relative;
    opacity: 0;
    animation: expandWidth 0.8s ease-out 0.5s forwards;
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
    color: var(--dark);
}

.step p {
    color: var(--gray);
    font-size: 0.875rem;
}

/* Testimonials */
.testimonials {
    padding: var(--space-2xl) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

.testimonial {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease-out forwards;
    animation-delay: calc(var(--delay) * 0.2s);
}

.testimonial-content {
    background: var(--white);
    padding: var(--space-lg);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.testimonial-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.testimonial-content p {
    font-size: 1.125rem;
    color: var(--dark);
    margin-bottom: var(--space-md);
    font-style: italic;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.testimonial-author strong {
    color: var(--primary);
    font-weight: 600;
}

.testimonial-author span {
    font-size: 0.875rem;
    color: var(--gray);
}

/* CTA Section */
.final-cta {
    padding: var(--space-2xl) 0;
    background: var(--gradient-dark);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--space-sm);
    animation: fadeInUp 0.8s ease-out;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--gray-light);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.cta-form {
    max-width: 500px;
    margin: 0 auto var(--space-md);
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.form-group {
    display: flex;
    gap: var(--space-sm);
    background: var(--white);
    padding: 0.5rem;
    border-radius: 50px;
}

.email-input {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: none;
    background: transparent;
    font-size: 1rem;
    color: var(--dark);
    outline: none;
}

.email-input::placeholder {
    color: var(--gray);
}

.submit-button {
    background: var(--gradient-primary);
    border: none;
    white-space: nowrap;
}

.cta-note {
    font-size: 0.875rem;
    color: var(--gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.note-icon {
    font-size: 1.125rem;
}

/* Footer */
.footer {
    padding: var(--space-lg) 0;
    background: var(--dark);
    color: var(--white);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.footer-tagline {
    color: var(--gray-light);
    font-size: 0.875rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes expandWidth {
    from {
        opacity: 0;
        transform: scaleX(0);
    }
    to {
        opacity: 1;
        transform: scaleX(1);
    }
}

/* Spinner de chargement */
.spinner {
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: 0.5rem;
}

/* Effet de float amélioré */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}(-20px) rotate(5deg);
    }
    75% {
        transform: translateY(20px) rotate(-5deg);
    }
}

@keyframes bookFloat {
    0%, 100% {
        transform: perspective(1000px) rotateY(-15deg) translateY(0);
    }
    50% {
        transform: perspective(1000px) rotateY(-15deg) translateY(-10px);
    }
}

@keyframes sparkle {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    50% {
        transform: scale(1.2) rotate(180deg);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.2;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.3;
    }
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Typing animation */
.typing-demo {
    overflow: hidden;
    white-space: nowrap;
    animation: typing 3s steps(30, end) infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

/* Ajustements pour mobile */
@media (max-width: 768px) {
    .logo-header {
        top: 1rem;
    }

    .logo-text {
        font-size: 1.5rem;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 4rem;
    }

    .typing-word {
        min-width: 60px;
    }

    .typing-cursor {
        width: 2px;
    }

    .hero-visual {
        margin-top: var(--space-lg);
    }

    .book-cover {
        transform: perspective(1000px) rotateY(0deg);
    }

    .ai-assistant {
        position: static;
        margin-top: var(--space-md);
    }

    .ai-bubble {
        margin: 0 auto;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .steps {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .step-connector {
        display: none;
    }

    .form-group {
        flex-direction: column;
    }

    .email-input {
        text-align: center;
    }

    .floating-word {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-big {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .problem-card,
    .testimonial-content {
        padding: var(--space-md);
    }
}

/* Accessibilité */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible pour l'accessibilité */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Mode sombre (optionnel) */
@media (prefers-color-scheme: dark) {
    :root {
        --dark: #F8FAFC;
        --white: #0F172A;
        --off-white: #1E293B;
        --gray: #94A3B8;
        --gray-light: #64748B;
    }

    .nav {
        background: rgba(15, 23, 42, 0.95);
    }

    .ai-bubble,
    .problem-card,
    .testimonial-content {
        background: var(--dark-light);
    }
}


/* Header avec logo et auth */
.logo-header {
    position: absolute;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 90%;
    max-width: 1200px;
}

.header-auth {
    display: flex;
    align-items: center;
}

/* Styles pour le bouton d'authentification */
.auth-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.auth-trigger:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
}

.auth-trigger svg {
    width: 18px;
    height: 18px;
}

/* Menu utilisateur connecté */
.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    background: var(--gradient-primary);
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(139, 92, 246, 0.3);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 0.875rem;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    padding: 1rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1000;
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-info {
    padding: 0 1rem 0.5rem;
    display: flex;
    flex-direction: column;
}

.user-info strong {
    color: var(--dark);
    font-size: 0.875rem;
}

.user-info span {
    color: var(--gray);
    font-size: 0.75rem;
}

.user-dropdown hr {
    border: none;
    height: 1px;
    background: var(--off-white);
    margin: 0.5rem 0;
}

.user-dropdown a,
.logout-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--gray);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
}

.user-dropdown a:hover,
.logout-link:hover {
    background: var(--off-white);
    color: var(--dark);
}

/* Responsive */
@media (max-width: 768px) {
    .logo-header {
        width: 95%;
        flex-direction: column;
        gap: 1rem;
        top: 1rem;
    }

    .header-auth {
        order: -1; /* Met l'auth en premier sur mobile */
    }
}